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Foothill Sanitary Landfill Page 34 of 53 San Joaquin County DPW - Solid Waste Joint Technical Document Revised 6/09/2020 Scott Solari, Manager Office (209) 466-5086 Cell (209) 406-7387 Foothill Landfill Scale House (209) 887-3969 Tony Gladney, Site Superintendent (209) 430-4825 Linden Peters Fire Department (209) 887-3710 6.2. Spreading and Compacting Refuse The site is divided into modules to facilitate efficient excavation, access, and drainage. Excavation precedes one module ahead of refuse fill. The number and size of the modules may change depending on the amount of incoming waste and construction sequencing by the County. The modules are being constructed by the ramp-area method. Waste is placed on a sloped surface in compacted lifts. Refuse is placed in lifts of 6 to 10 feet thick, with perimeter slopes horizontal to vertical ratio of 3:1 or less. Refuse is spread and compacted in layers of approximately two feet thick on a sloped working face approximately 100 feet x 100 feet in size. Large and bulky wastes are separated to prevent bridging of the surrounding refuse, placed in the lower portion of the advancing lift, and crushed by compacting equipment. Temporary berms are constructed where needed to intercept and divert surface runoff water away from the working face. The operator uses the flat-area (pancake) method for filling future modules. This method consists of spreading the refuse by a bulldozer into a level layer of approximately 24” deep across a designated area of the Module. The advantage of this procedure is that compaction is maximized on a level surface, as opposed to traditional ramp-area compaction. Once spread, the refuse is compacted and the next layer spread. This process is repeated until a 10-feet lift has been created, and then the process is restarted at the next designated area.